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Relatives of Palestinian Hamas militant Ahmed al-Zahar, who was killed when a tunnel collapse on Tuesday, mourn during his funeral in the village of Al-Moghraga near central Gaza Strip, February 3, 2016. The collapse of a tunnel in the Gaza Strip has killed two militants from Hamas's armed wing, officials said Wednesday, as concern grows in Israel over the rebuilding of tunnels that can be used for attacks. Photo by Mohammed Asad